Nb: Passengers wanting more legroom on Air France and Singapore Airlines will soon have to pay an extra £40 for a seat next to an emergency exit or at the front of a row.

Other carriers are expected to impose a similar "tall tax". For my other half - six foot-plus - who's spent countless miserable hours with his knees jammed up under his chin, this sounds like good news.

But will it make any difference? Most passengers I've seen occupying exit seats are big lumps. I trust airlines will make it perfectly clear when imposing the tax that six foot refers to the traveller's height not their circumference.